Aluminum electrolytic capacitor capable of preventing identification film from falling off
By printing the marking on the bottom of the aluminum shell of the aluminum electrolytic capacitor and applying Teflon film on it, the problem of marking film falling off in high temperature and high humidity environment is solved, and the recognition of the capacitor in harsh environments is significantly improved. Maintenance reliability.
Patent Information
- Application Number
- CN202420935992.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In high temperature and high humidity environments, the identification film of the aluminum electrolytic capacitor is prone to fall off, resulting in the inability to effectively identify the capacitor parameters and affecting maintenance.
The marking film is formed at the bottom of the aluminum shell by printing technology, and a layer of Teflon film is applied to the marking film as a protective film to prevent the marking film from falling off.
Under high temperature and high humidity conditions, the marking film of the aluminum electrolytic capacitor protected by Teflon film can be kept for 1,000 hours without falling off, while the capacitor without a protective film can only be maintained for 500 hours.
Smart Images
Figure CN222483147U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an aluminum electrolytic capacitor, in particular to an aluminum electrolytic capacitor with an anti-shedding identification film. Background Art
[0002] As one of the three core components of electronic products, aluminum electrolytic capacitors play an irreplaceable role in the circuit. The appearance marking of aluminum electrolytic capacitors is an important basis for correctly identifying the parameter characteristics of aluminum electrolytic capacitors. With the continuous improvement of scientific and technological progress, the casing marking of traditional aluminum electrolytic capacitors has been limited in many application scenarios and cannot be used as the appearance marking of aluminum electrolytic capacitors. With the advancement of new printing technology, printing marking has become the preferred marking method for high-end aluminum electrolytic capacitors and capacitors in special application scenarios.
[0003] The printing technology is to print the relevant parameter characteristics of the aluminum electrolytic capacitor directly on the surface of the aluminum shell, which does not affect the normal opening of the aluminum shell explosion-proof valve. In the normal use scenario of the aluminum electrolytic capacitor, the printing is the identification film, and there will be no situation such as falling off and unclear appearance markings. However, in some high temperature and high humidity environments (such as the engine compartment of a car), the printing will fall off, which directly affects the effective identification of the aluminum electrolytic capacitor and causes great trouble to the subsequent related maintenance. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an aluminum electrolytic capacitor with an anti-shedding identification film.
[0005] In order to solve the above technical problems, the technical solution proposed by the utility model is: an aluminum electrolytic capacitor with an anti-shedding identification film, comprising an aluminum shell, a core package and a rubber plug, wherein the core package is sealed in the aluminum shell by the rubber plug; a logo film is formed on the bottom of the aluminum shell by printing, and a protective film is formed on the logo film.
[0006] In the above-mentioned aluminum electrolytic capacitor with an anti-shedding identification film, preferably, the protective film comprises a Teflon film coated or sprayed on the identification film.
[0007] In the above-mentioned aluminum electrolytic capacitor with an anti-falling identification film, preferably, a PU film is plated on the bottom of the aluminum shell, and the identification film is formed on the PU film by printing.
[0008] In the above-mentioned aluminum electrolytic capacitor with an anti-shedding identification film, preferably, the explosion-proof valve at the bottom of the aluminum shell is arranged on the inner side of the aluminum shell.
[0009] In the above-mentioned aluminum electrolytic capacitor with an anti-shedding identification film, preferably, a layer of padding paper is provided between the core package and the bottom of the aluminum shell.
[0010] Compared with the prior art, the utility model has the advantages that: in the utility model, after the logo film is printed on the bottom of the aluminum shell by the stamping technology, a protective film is coated on the logo film; the protective film can protect the logo film, thereby preventing the logo film from falling off from the bottom of the aluminum shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic diagram of the cross-sectional structure of the bottom of the aluminum shell in Example 1.
[0012] Figure 2 This is a schematic diagram of the structure of spraying Teflon on the bottom of the aluminum shell in Example 1.
[0013] Legend
[0014] 1. Aluminum shell; 2. PU film; 3. Logo film; 4. Teflon film; 5. Limiting plate. DETAILED DESCRIPTION
[0015] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively and carefully below in conjunction with the accompanying drawings and preferred embodiments of the specification, but the protection scope of the present invention is not limited to the following specific embodiments.
[0016] It should be noted that when an element is described as being "fixed, fixed, connected or connected to" another element, it can be directly fixed, fixed, connected or connected to the other element, or it can be indirectly fixed, fixed, connected or connected to the other element through other intermediate connectors.
[0017] Unless otherwise defined, all professional terms used below have the same meanings as those generally understood by those skilled in the art. The professional terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the scope of protection of the present utility model. Example 1
[0018] An aluminum electrolytic capacitor with an anti-shedding identification film 3 comprises an aluminum shell 1, a core package and a rubber plug, wherein the core package is sealed and arranged in the aluminum shell 1 through the rubber plug. The core package is wound by an anode foil, an electrolytic paper and a cathode foil; an anode guide pin and a cathode guide pin are riveted on the anode foil and the cathode foil respectively; and the anode guide pin and the cathode guide pin extend out of the rubber plug respectively.
[0019] In this embodiment, if Figure 1 As shown, a marking film 3 is formed on the bottom of the aluminum shell 1 by printing, and a protective film is formed on the marking film 3. In this embodiment, the protective film is formed by spraying a Teflon (polytetrafluoroethylene, abbreviated as PTFE) solution on the marking film to form a film. In other embodiments, the Teflon solution can be formed on the bottom of the aluminum shell 1 by coating.
[0020] like Figure 2 As shown, when spraying Teflon solution on the identification film 3, the capacitor is fixed by a limit plate 5; the limit plate 5 divides the aluminum shell into two parts. One part is the bottom of the aluminum shell 1, that is, the end where the Teflon solution needs to be sprayed; the other part is the end of the aluminum shell close to the anode guide pin and the cathode guide pin. Due to the effect of the limit plate 5, Teflon will not be sprayed on the end of the aluminum shell 1 close to the anode guide pin and the cathode guide pin, and the welding will not be affected by the Teflon coating on the anode guide pin and the cathode guide pin.
[0021] In this embodiment, a PU film 2 (polyurethane film) is plated on the bottom of the aluminum shell 1, and the identification film 3 is formed on the PU film 2 by printing. Printing is to print ink on the PU film 2. Under high temperature and high humidity environment, the ester group in the PU film 2 on the bottom of the aluminum shell 1 undergoes hydrolysis reaction, which will cause the identification film 3 to fall off; the hydrolysis reaction is as follows:
[0022] .
[0023] In this embodiment, the explosion-proof valve at the bottom of the aluminum shell 1 is arranged on the inner side of the aluminum shell 1; a layer of padding paper is arranged between the core package and the bottom of the aluminum shell 1. The explosion-proof valve is arranged on the inner side of the aluminum shell 1, so that the area where the identification film 3 is formed by the stamping technology at the bottom of the aluminum shell 1 is a complete plane, so that the identification film 3 will not be missing after it is formed due to the explosion-proof film. In this embodiment, since the explosion-proof valve is built-in, the inner side of the bottom of the aluminum shell 1 is not a complete plane, and the short circuit between the anode foil in the core package and the aluminum shell 1 is prone to occur. The padding paper can separate the explosion-proof valve from the core package, so that the smoothness of the groove edge of the explosion-proof valve groove can be reduced, and the processing requirements of the aluminum shell 1 are reduced. At the same time, the padding paper can also play a buffering role when the explosion-proof valve of the capacitor is suddenly opened to form an explosion, reducing the possibility of the electrolyte being sprayed onto the circuit board and causing a fire.
[0024] In this embodiment, after the identification film 3 is printed on the bottom of the aluminum shell 1 by the stamping technology, a layer of Teflon film 4 is coated on the identification film 3; the Teflon film 4 can protect the identification film 3, thereby preventing the identification film 3 from falling off from the bottom of the aluminum shell 1.
[0025] The aluminum electrolytic capacitor prepared using this embodiment has no printing falling off after 1000 hours under high temperature and high humidity conditions of 85°C and 85% humidity; however, the aluminum electrolytic capacitor without Teflon film 4 has printing falling off after 500 hours of high temperature and high humidity.
Claims
1. An aluminum electrolytic capacitor with an anti-shedding identification film, comprising an aluminum shell, a core package and a rubber plug, wherein the core package is sealed in the aluminum shell by the rubber plug; characterized in that: A marking film is formed on the bottom of the aluminum shell by printing, and a protective film is formed on the marking film.
2. The aluminum electrolytic capacitor with an anti-marking film peeling according to claim 1, characterized in that: The protective film includes a Teflon film coated or sprayed on the marking film.
3. The aluminum electrolytic capacitor with an anti-marking film peeling according to claim 1, characterized in that: A layer of PU film is plated on the bottom of the aluminum shell, and the logo film is formed on the PU film by printing.
4. The aluminum electrolytic capacitor with an anti-marking film peeling according to claim 1, characterized in that: The explosion-proof valve at the bottom of the aluminum shell is arranged on the inner side of the aluminum shell.
5. The aluminum electrolytic capacitor with an anti-marking film peeling according to claim 4, characterized in that: A layer of padding paper is arranged between the core package and the bottom of the aluminum shell.